DDR3-2133 Memory Performance

By now, most readers have noticed that the performance of DDR3-1600 reference memory doesn’t change. That’s because it’s always at DDR3-1600 CAS 9, regardless of the data rate its on-paper competition is running. In this case, everything but the reference memory is operating at DDR3-2133, which should kick performance up a couple notches.

what happens if you mix sets? do they run at the lowest speed of any of the installed sticks? Hearing a lot of opinion that they 'won't work' and would like a proper objective answer to help people out there with.